. >> i really specialize in technology and helping those small technology companies through the process. >> you find that champion for your cause and you ride that for all its worth. >> reporter: our cameras were allowed along on actual lobby visits, being conducted most any time congress is in session. davis is such a familiar face in the halls of the capitol, republican congresswoman mary bono mack greets him with a kiss. >> lobbyists trade on -- if you want to use the bad word -- trade on friendships. >> excuse me. this is a won woman. >> do i ever ask a friend to do something contrary to their values and judgment on the facts? never. >> you know i've been a friend of the congressman for many years. >> i do. reporter: today they're paying a call on pennsylvania democratic congresswoman. >> that's why i try to make sure my door is open to everyone. and that we get the right information so we can make the best decisions. >> reporter: there are two components to successful lobbying. access and money. donations from lobbyists and their clients to members of congress. while it's illegal f